The pi (3) can either use its build in wifi with the a wifi provided by the wrt or in case of congress could also use the WPA2-enterprise network. Alternative ethernet can be used
The current hardware is a Raspberry Pi 3, we need evaluate if the intercom part also works stable with an older pi.
as it has turned out, the logitech headsets are not suitable for live envirenments. Therefore we looked into other options
Our JVC Cams run on 12V and the Panasonic on 7,5V, therefore we have a step-down converter which provides 5V for the tallycom.
We use a LM2596S DC-DC stepdown converter which has an input voltage range from 1,5 - 35V and can provide up to 3A.
This should work with most other cams to as long as you are not to close to 5V.
voctolight is a tellylight part of this project. It listens on the voctomix control channel.
The code is developed in the voctomix repository in the exemple scripts dir.
To get started you need a LED and a resistor. For a normal red LED this would be 330Ohm. Connect the LED with its + to pin 11 and with its - to GND (pin 6)
setup:
ssh voc@10.73.1.15 cd /opt/voctomix/release/example-scripts/voctolight/ vim config.ini sudo systemctl restart voctolight.service
The new version of the tally software uses all three colors of the LED:
It shares much code with the Voctoknopf software and is therefore hosted in the same repository. Installation works as follows:
$ git clone https://github.com/rlutz/voctoknopf $ scp -r voctoknopf/src voc@10.73.1.15:tally-src $ ssh voc@10.73.1.15 ~ $ cd tally-src/ ~/tally-src $ make all-tally ~/tally-src $ sudo make install-tally ~/tally-src $ sudo vim.tiny /etc/tally.conf ~/tally-src $ sudo reboot
When replacing the old software with the new one, don't forget to disable the old ‘voctolight’ service before rebooting.
Once installed, the configuration can be changed as follows:
$ ssh voc@10.73.1.15 ~ $ sudo vim.tiny /etc/tally.conf ~ $ sudo systemctl restart tally
For more documentation, see https://github.com/rlutz/voctoknopf/blob/master/src/Tally.md
To get a audio connection between mixer and camera operator we run a command line mumble client on an rasperrypi 2/3 connected to an USB Headset. For small events, this client connects to a mumble server on the voctogui laptop (or the cube / minion); for bigger event to, a central one running in the server case. Another option would be SIP, but mumble seems to better fit the requirements.
The mixer operator should be able to use push to talk with the keyboard of the mixer or an button in the UI. The camera operators should be able to use the button on the headset for push to talk.
c.f. https://github.com/dchote/talkiepi and https://github.com/dchote/talkiepi/tree/master/doc
To change the configuration edit /etc/systemd/system/mumble.service
TODO: check/fix systemd unit – workaround: run manually inside of screen
Does not
see https://github.com/dchote/talkiepi/tree/master/doc
You need to edit /usr/share/alsa/alsa.conf
and change defaults.ctl.card 1
and defaults.pcm.card 1
This is based on a RasPi 3 and Raspian:
First, create /etc/asound.conf with the following contents:
pcm.!default { type plug slave.pcm { @func getenv vars [ ALSAPCM ] default "hw:Headset" } }
This will map the Headset to be the default sink/source for audio. This app is written in Go, so we need to install go first, plus a few dependencies written in C, which we pull in via APT. They handle sound and opus encoding respectively:
cd ~ # Get golang for ARM: https://golang.org/dl/ (get go?.?.?.linux-armv6l.tar.gz) tar xvfz go?.?.?.linux-armv6l.tar.gz apt install libopus-dev libopenal-dev export GOPATH=$HOME/gocode
Next, we can build barnard, a gui-based client, that you may want to run in a screen session for production purposes.
~/go/bin/go get github.com/layeh/barnard ~/go/bin/go compile github.com/layeh/barnard #set GOARM=7 to get ARMv7-optimized code strip ~/gocode/gocode/src/github.com/layeh/barnard/main sudo cp ~/gocode/gocode/src/github.com/layeh/barnard/main /usr/local/bin/barnard # (exported.pem is the cert exported from the official mumble client as exported.p12, # and then run thrugh "openssl pkcs12 -in ~/exported.p12 -out ~/exported.pem -nodes" barnard server="mumble.server.example.net:64738" -username=cam1 -insecure=true -certificate=exported.pem
GUI shortcuts: F1 mutes/unmutes on a protocol level, F10 quits.